Plants adapted to open, sunny habitats are

Options

A. Sciophytes
B. Heliophytes
C. Mesophytes
D. Epiphytes.

Answer

To determine which type of plants are adapted to open, sunny habitats, we can analyze the options provided:

1. **Cophytes**: These plants thrive in low light conditions. They are not suited for sunny habitats, so this option is incorrect.

2. **Heliophytes**: These plants are specifically adapted to high light intensity and open sunny environments. They are often referred to as "sun plants" because they require and thrive in bright sunlight. This option is correct.

3. **Mesophytes**: These plants require a moderate amount of water and can survive in a variety of habitats, but they are not specifically adapted to sunny environments. Therefore, this option is also incorrect.

4. **Epiphytes**: These are organisms that grow on the surface of other plants. They derive moisture and nutrients from the air, rain, and debris around them, rather than from the soil. They are not specifically adapted to sunny habitats, making this option incorrect as well.

**Conclusion**: The correct answer is **heliophytes**, as they are the plants adapted to open, sunny habitats.

### Step-by-Step Solution:
1. **Identify the options**: Cophytes, Heliophytes, Mesophytes, Epiphytes.
2. **Analyze Cophytes**: Understand that they thrive in low light conditions—incorrect for sunny habitats.
3. **Analyze Heliophytes**: Recognize that they are adapted to high light intensity—correct for sunny habitats.
4. **Analyze Mesophytes**: Note that they require moderate water but are not specific to sunny habitats—incorrect.
5. **Analyze Epiphytes**: Understand that they grow on other plants and derive nutrients from the air—incorrect for sunny habitats.
6. **Select the correct answer**: Conclude that the correct option is Heliophytes.